algebra experts, need help! ANOTHER ONE on p.4

[dmh]

Try this out, I can't make a superscript on this format but when you see x2 it means x squared or (x)(x)


Let x=1

So x=x2

Subtract 1 from both sides so that

(x-1)=(x2-1)

factor x2-1 to equal (x+1) (x-1)

so that

(x-1)=(x+1)(x-1)

divide both sides by (x-1)

(x-1) = (x+1)(x-1)
----- ------------
(x-1) (x-1)

Therefore

1 = (x+1)

If x was originally =1

1 = (1+1)

So

1=2

Yes I did violate 1 math rule but it’s great to use on folks who can’t "see" algebra. It's also fun to prove that 7 x 13 = 28. I use a lot of things like this at the beginning of every year just to see how much algebra my students really know.

 

[Jimmy Dean]

 

[dmh]

Pretty good call.

 

[RyanW]

Dammit, too many -'s lol

 

[LACamper]

Dang Spank, you even worked it out for him.... nice.

Now do it in binary...

 

[topgunz1]

 

[tunatuk]

I don't even know why I clicked on this thread. I suck at math.

The answer is goat.

x=goat

 

[honestlou]

Try this out, I can't make a superscript on this format but when you see x2 it means x squared or (x)(x)


Let x=1

So x=x2

Subtract 1 from both sides so that

(x-1)=(x2-1)

factor x2-1 to equal (x+1) (x-1)

so that

(x-1)=(x+1)(x-1)

divide both sides by (x-1)

(x-1) = (x+1)(x-1)
----- ------------
(x-1) (x-1)

Therefore

1 = (x+1)

If x was originally =1

1 = (1+1)

So

1=2

Yes I did violate 1 math rule but it’s great to use on folks who can’t "see" algebra. It's also fun to prove that 7 x 13 = 28. I use a lot of things like this at the beginning of every year just to see how much algebra my students really know.

Undefined for x = 1

I was always good at math, but never took more than one business calculus, and that was 30 years ago.

So try to convince me that .9 repeating = 1. I've never bought that.

 

[Cat]

ROFL. By 12th grade I learned to look for a zero on any equation with more than two letters. Ihad a couple smartasses.

 

[Baldrik78]

LOL. Nice.....

Thank you, thank you. I'll be here all night. Try the veal.

 

[JLouv]

All the math you need to know....

 

[dfsutton]

My math career:

Geometry? No problem. Algebra? Getter done. Trigonometry? Starting to get a little difficult. Calculus? What the hell? I'm done. Screw engineering. Not gonna make it.

 

[dfsutton]

All the math you need to know....

Yeah. Hate to be that guy, but it should be "girls = time + money".

 

[dtd80]

My math career:

Geometry? No problem. Algebra? Getter done. Trigonometry? Starting to get a little difficult. Calculus? What the hell? I'm done. Screw engineering. Not gonna make it.

Say it ain't so!

 

[ryan]

Got another one for you guys...


Elaine sold 3 times as many magazine subscriptions as ron did. Ron sold 16 fewer subscriptions than elaine did. How many did ron sell?

 

[James Cannon]

First statement: e = 3r
Second statement: r = e-16

r = 3r-16
-2r = -16
r = 8

 

[Bmguidry]

let E=elaine and R=ron
E=3(R)
R=E-16
E=3(E-16)
E=3E-48
E(1-3)=-48
E(-2)=-48
E=24
R=24-16
R=8

 

[ryan]

thanks guys. I just had trouble writing that one out. I emailed my teacher twice and he never got back to me, what a help he is.

 

[03protege]

thanks guys. I just had trouble writing that one out. I emailed my teacher twice and he never got back to me, what a help he is.

Where you go to school?

 

[Orfus5]

wolframalpha.com can solve almost anything you need non world problem related.

I´ve been using it to help with calculus. It even shows how to work things out. Only hard part is knowing how to type what you need in the box.